Dashpot



E. KAUN Sept. 9, 1930.

DASHPOT Filed May l, 1928 Patented Slept. 9, 1930 EUGEN KAUN, OELINDELFINGEN, GERMANmssiGdR 'rofnnSnron` coinrAnY,

`or DAYTON, omo, A conronnrren orlurinsntrg Application inea may 1, i928, serial' No. avaaefimGerinany January`,1e,1928.5

' This invention relates to damping devices for weighing scales or the like and more particularly to damping devices consisting of dash pots. 1 l

rI he oscillations of the movable elements-of a; scale set vup upon the imposition or removal of a load from the scale are, as a rule, damped by connecting oneorrmore of said movable parts to a dash pot device.

1 The `dash pot cylinder is filled with a suitable fluid7 preferably oil, and the piston moving in the fluid of said-cylinderV is connected i ing in the cylinder head; f

`to the movable scale part. It often happens that thesudden imposition or removal of a load causes the piston tomove with a jerk through the fluid in the dash pot, tending to squirt said fluid violently through the open-` ingin the cylinder head provided for the piston` rod. VAs the loss of fluid changes the adjustment of the scale, it is desirable to pre.- vent the squirting of fluid thr The object of this invention'is to provide means for preventing loss of the damping fiuid through the cylinder head openings.

Various other objects and advantages of my invention will be obvious from the following particular description of one form of mechanism embodying the inventionor from an inspection of the accompanying drawing;

andthe invention also constitutes certain t new and novel features ofconstruction and l comprising the essence of this invention and,

combination of parts hereinafterfset fori-,h and claimed. f Y

Fig. l `a part sectional view of the cylinder' Fig. 2 isa section through the member an opening for vaccommodating the piston rod. i i With the above described construction, the

,other `substance may be used so,i longas :fthe

ough the opensuddenmovementofgthe piston-,head 3 isapt i to squirtsome oftheffluid through thelopening in the cylinder head 6. `In order to` pre-"1 vent thisaction, acoveringmember? is providedwhich isfof lower specific gravitylthan `55p the fluid in order that itlfloat 'onto'p ofthe fluid; i `The, member'?,Y is fashionedas a hollowV body, preferably of sheet, metal `although any specific gravity of the member 7 remains lessffthanthespecic gravity of the fluid. i The member 7 is made to cover as` far as possible the whole surface of the fluid substance in the cylinderalthough an adequate amount of play must be provided between theouter periphery of the member and the walls of the'cylinder and theinner periphery of, `I l the member and the sides of the piston rod.

The top of member 7 is made to slope in this particular case towards the'walls of the cylinder, in order that any oil which has forced its way between the covering member and the piston rod or cylinder walls will flow r oif the top of the member and return htothe main body of oil. y l l "15 The covering member resists any tendency i 'of the vfluid in the cylinderto move violently and confines the spacebet'ween which the iiuid may move so that the energy of the fluid will be spent before it reaches the opening in the cylinderhead 6.

While I have: shown and described and pointed out` the fundamental novel features of the Vinvention asapplied to a single modifi- `cationit will be understood that various omissions `andsubstitutions and ,changes in the form and details of the device illustrated and in its operation may be made by thoseskilled inthe art without departing from the spirit of the invention. I` intend to be limited therefore only as indicatedby the,` scope of# the following claims.` Y f l. A dash pot mechanism comprising a cylinder containing liquid, a piston movable 95 through said liquid, and a movable device for covering said liquid to prevent surging of said liquid uponsudden action of said piston.

2.` A dash' pot mechanism comprising a cylf V,inder containing liquid,` ,a piston movable 1G@ therethrough, and a member floating on top of said liquid to prevent violent surging of said liquid.

3. A dash pot mechanism comprising a cylinder containing liquid, a piston movable through said liquid, and a hollow body freely floating on top of said liquid to prevent squirting thereof. t

4. A dash pot device comprising a cylinder containing liquid, a piston in said cylinder under pressure of said,liquid, and a member provided with a sloping top oating on top of said liquid.

5. A dash pot device comprising a cylinder containing fluid, a piston in said cylinder under pressure of said fluid, and' a hollow body hav-ing a sloping top floating on top of said fluid.

6. A dash pot device comprising a cylinder containingfluid, a piston movable through said fluid, and a hollowv annular body floating on top of said fluid and provided on the top with a conical surface. p In testimony whereof I hereto affix my signature.

' EUG. KAUN. 

